EPA Method 507 - Performance Check Solution

Sodium p-n-tetradecylbenzenesulfonate, 100 µg/ml,

Isovitexin, 50mg

N-Nitrosodimethylamine, 2000µg/mL, Solvent-dichloromethane, Unit 1mL, # of units-1, Cas.no. 62-75-9